On 16 February 2013, at least 91 people were killed and 190 injured after a bomb hidden in a water tank exploded at a market in Hazara Town on the outskirts of Quetta, the capital city of Balochistan, Pakistan. Most of the victims were members of the predominantly Shia Twelver ethnic Hazara community, and authorities expected the death toll to rise due to the large number of serious injuries. The Lashkar-e-Jhangvi group claimed responsibility for the blast, the second major attack against the Shia Hazaras in a month.On 19 February, one of the masterminds of the attack was arrested and taken into custody along with 170 suspects, and four high-profile militants accused of killing Shia civilians were killed during an operation by security forces. Weapons, ammunition and bomb-making materials were seized by security officials during the operation.